Malicious PDF — malware analysis report

Static analysis result for SHA-256 f892571e7533eb18…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 01:03:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ba4b36d85e8d83a80a6d8b0d211d68c0 SHA-1: 1bdc23b074fe4f757949a06efd1fe97b449cfe58 SHA-256: f892571e7533eb18120c536229c433df74c22e19e9ffde28522cabfde50e034a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure is a link to 'coin-master-hack-cheat-engine-game-hack', which is hosted on netcdn.tw. The document's content and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-hack-cheat-engine-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-buying-apps_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-game-download-hacks-studio-login-guide-unofficial_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-inspect_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-robux-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/comment-ont-fais-pour-avoir-un-cheat-sur-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-game-no-dowload_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-scripters-for-free-help_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30B1 22772 bytes
SHA-256: 156edc3bfc787f73adb48ec3116b6f66389ce8762d8ee1bcba09b7efa2ea2b73
font_01_sfnt_off0000638f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 18172 bytes
SHA-256: 6d378876db4af438e413048c200e6c0cf3c65afaa8006b8855ef09357d24d00a

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